Parasitic Capacitances in Magnetic Components: Overview and Perspectives

Parasitic capacitances are important in magnetic components, especially for the high-frequency power electronic converters enabled by wide-bandgap semiconductors. For the clearer and more structural understanding of parasitic capacitance in magnetic components, this paper provides a comprehensive compendium of parasitic capacitance including the definition, quantification, and modelling. Different types of parasitic capacitances based on intrinsic properties are defined with corresponding frequency ranges of interest. Both frequency-domain and time-domain measurement methods are introduced for more accurate and convincing quantification. As for the physical mechanism and modelling of parasitic capacitances, energy-based, transmission-line, and behaviour-based approaches are discussed. In the end, the challenges and perspectives are provided for further inspirations.